Businesses specialising in wooden floor sanding and sealing restore and protect timber floors in homes and commercial premises. They assess the floor's condition, identify the type of timber and finish, and prepare the area before work begins. Sanding removes worn coatings, surface marks and minor unevenness, usually using progressively finer abrasives. Edges and corners may need separate equipment, and dust-control systems are commonly used to limit airborne particles. After sanding, the floor is cleaned and treated with a suitable finish to protect the wood and provide the required appearance. Options can include oils, waxes, lacquers and water-based sealers, with choices varying in sheen, durability, drying time and maintenance needs. Some businesses also carry out gap filling, repairs to damaged boards, staining, polishing and maintenance of previously treated floors.